結果

問題 No.2358 xy+yz+zx=N
ユーザー tenten
提出日時 2024-07-31 11:00:09
言語 Java
(openjdk 23)
結果
AC  
実行時間 364 ms / 2,000 ms
コード長 2,966 bytes
コンパイル時間 2,526 ms
コンパイル使用メモリ 84,416 KB
実行使用メモリ 61,540 KB
最終ジャッジ日時 2024-07-31 11:00:17
合計ジャッジ時間 6,638 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge5
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 10
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ソースコード

diff #
プレゼンテーションモードにする

import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;
public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        List<Answer> ans = new ArrayList<>();
        int count = 0;
        for (int i = 0; i <= Math.sqrt(n); i++) {
            for (int j = i; j <= Math.sqrt(n); j++) {
                if (i == 0 && j == 0) {
                    continue;
                }
                if ((n - i * j) % (i + j) == 0 && (n - i * j) / (i + j) >= j) {
                    Answer current = new Answer(i, j, (n - i * j) / (i + j));
                    count += current.size();
                    ans.add(current);
                }
            }
        }
        System.out.println(count);
        System.out.println(ans.stream().map(x -> x.toString()).collect(Collectors.joining("\n")));
    }
    
    static class Answer {
        Set<Three> threes = new HashSet<>();
        public Answer(int a, int b, int c) {
            threes.add(new Three(a, b, c));
            threes.add(new Three(a, c, b));
            threes.add(new Three(b, a, c));
            threes.add(new Three(b, c, a));
            threes.add(new Three(c, a, b));
            threes.add(new Three(c, b, a));
        }
        
        public int size() {
            return threes.size();
        }
        
        public String toString() {
            return threes.stream().map(x -> x.toString()).collect(Collectors.joining("\n"));
        }
    }
    
    static class Three {
        int a;
        int b;
        int c;
        
        public Three(int a, int b, int c) {
            this.a = a;
            this.b = b;
            this.c = c;
        }
        
        public int hashCode() {
            return Objects.hash(a, b, c);
        }
        
        public boolean equals(Object o) {
            Three x = (Three)o;
            return a == x.a && b == x.b && c == x.c;
        }
        
        public String toString() {
            return a + " " + b + " " + c;
        }
    }
}
class Scanner {
    BufferedReader br;
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() {
        try {
            br = new BufferedReader(new InputStreamReader(System.in));
        } catch (Exception e) {
            
        }
    }
    
    public int nextInt() {
        return Integer.parseInt(next());
    }
    
    public long nextLong() {
        return Long.parseLong(next());
    }
    
    public double nextDouble() {
        return Double.parseDouble(next());
    }
    
    public String next() {
        try {
            while (!st.hasMoreTokens()) {
                st = new StringTokenizer(br.readLine());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            return st.nextToken();
        }
    }
    
}
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